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DisableAutoConnect semantics
============================
Scope: governs ONLY the service-Start auto-connect decision. Once the
connection goroutine has been spawned (by any path), the flag is never
consulted again — the retry loop keeps trying to connect until ctx is
cancelled by Down / Stop / Logout.
Cases
-----
1. Service Start + DisableAutoConnect = true
- No connection goroutine spawned.
- clientRunning stays false.
- State set to StatusIdle.
- Daemon stays passive until an explicit Up RPC.
2. Service Start + DisableAutoConnect = false
- Spawn connectWithRetryRuns.
- clientRunning = true.
- Retry loop runs until ctx cancelled.
3. Up RPC (any value of DisableAutoConnect)
- Flag ignored. The user / admin explicitly asked to connect — by
definition not "auto".
- Spawn connectWithRetryRuns.
- clientRunning = true.
4. MDM-triggered restart (any value of DisableAutoConnect)
- Flag ignored. An MDM policy change applies new config to an
already-running engine; treated as an implicit Up.
- Spawn connectWithRetryRuns.
- clientRunning = true.
5. Down / Stop / Logout
- Cancels ctx → connectWithRetryRuns exits → close(giveUpChan).
- cleanupConnection clears clientRunning = false.
- DisableAutoConnect not involved.
Prepare for next step
Collapse error log into s.connect and rename it to more explicit connectOnce